D sub 2

D sub 2D sub 2D sub 2D sub 2D sub 2D sub 2
D sub 2D sub 2D sub 2D sub 2D sub 2D sub 2
D sub 2D sub 2D sub 2D sub 2D sub 2D sub 2D sub 2D sub 2D sub 2D sub 2D sub 2D sub 2D sub 2D sub 2D sub 2D sub 2D sub 2D sub 2D sub 2D sub 2D sub 2D sub 2D sub 2D sub 2D sub 2D sub 2D sub 2D sub 2D sub 2D sub 2D sub 2D sub 2D sub 2D sub 2D sub 2D sub 2